Simple Firmware Interface
| Offset | Length | Field |
|---|---|---|
| 0 | 4 | Signature |
| 4 | 4 | Length |
| 8 | 1 | Revision |
| 9 | 1 | Checksum |
| 10 | 6 | OEM ID |
| 16 | 8 | OEM Table ID |
| 24 | var. | Table Payload |
Simple Firmware Interface (SFI) is developed by Intel Corporation as a lightweight method for firmware to export static tables to the operating system. It is supported by Intel's hand-held Moorestown platform.
SFI tables are data structures in memory, and all SFI tables share a common table header format. The operating system finds the system table by searching 16 byte boundaries between physical address Page Template:Mono/styles.css has no content.0x000E0000 and Page Template:Mono/styles.css has no content.0x000FFFFF. SFI has CPU, APIC, Memory Map, Idle, Frequency, M-Timer, M-RTC, OEMx, Wake Vector, I²C Device, and a SPI Device table.
SFI provides access to a standard ACPI XSDT (Extended System Description Table). XSDT is used by SFI to prevent namespace collision between SPI and ACPI. It can access standard ACPI tables such as PCI Memory Configuration Table (MCFG).
SFI support was merged into Linux kernel 2.6.32-rc1;[1] the core SFI patch is about 1,000 lines of code. Linux is the first operating system with an SFI implementation. Linux kernel 5.6 marked SFI as obsolete.[2]
SFI support was removed in Linux kernel 5.12.[3]
References
Page Template:Reflist/styles.css has no content.
- ^ Page Module:Citation/CS1/styles.css has no content."Upstream Linux Kernel Support". June 2009.
- ^ Page Module:Citation/CS1/styles.css has no content."The Linux Kernel Obsoletes The Intel Simple Firmware Interface - Phoronix". www.phoronix.com. Retrieved 2020-09-16.
- ^ Page Module:Citation/CS1/styles.css has no content.Wysocki, Rafael. "Linux-Kernel Archive: [GIT PULL] Simple Firmware Interface (SFI) support removal for v5.12-rc1". lkml.iu.edu. LKML. Retrieved 26 February 2021.
External links
- Page Module:Citation/CS1/styles.css has no content.Brown, Len; Kamp, Kerry Vander (2010-10-19). "Simple Firmware Interface - Draft 0.8.2" (PDF). Archived from the original (PDF) on 2016-03-04.
- Page Module:Citation/CS1/styles.css has no content.Brown, A. Leonard (2009). "The Simple Firmware Interface" (PDF). Ottawa Linux Symposium 2009.
